Optical film including an infrared absorption layer
a composite film, infrared absorption technology, applied in the field of composite films, can solve the problems of affecting other optical performance, lowering visible light transmittance, and affecting the performance of other optical performan
Inactive Publication Date: 2016-03-17
SAINT GOBAIN PERFORMANCE PLASTICS CORP
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Benefits of technology
The patent text describes a method for improving infrared absorption in composite films without the need for a silver layer. The method involves using specific materials and processing acts to achieve desired optical and solar properties. The technical effects of the patent include improved infrared absorption, selective rejection of solar energy, and synergistic meetings of transparency, solar energy rejection, and selectivity. The patent also describes various composite films that have been developed using these methods.
Problems solved by technology
However, for conventional composite films, including an infrared absorption layer to exhibit low reflectivity and absorptivity of infrared radiation can also lower the visible light transmittance.
However, attempts to improve solar properties, such as selectivity, continue to hinder other optical performance, such as the visible light transmittance, and vice versa.
Method used
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[0056]For each of the films, Samples A-E, the layers were deposited on a PET substrate by roll-to-roll (R2R) magnetron deposition with ceramic rotative targets for oxide materials, according to the parameters set forth in Table 1.
TABLE 1Quantity ofPressurePowerGasLayerTarget(μbar)(kW)Gas(sccm)AZOZnO:Al2O3 2% wt21.3Ar40 (Ar)GZOZnO:Ga2O381Ar + O2200 (Ar); 64.5% wt(Ar + O2)TiOTiOx22Ar + O220 (Ar); 3 (O2)NbONb2Ox0.752Ar + O215 (Ar); 14(Ar + O2)
For each sample, the PET substrate had a thickness of 50 micrometers. The order, composition, and thickness of the layers deposited on the substrate are set forth in Table 2 below. As shown in Table 2, Samples B, D, and E included dielectric layers and Samples A, C, and F did not. For Samples B, D, and E, the infrared absorption layer was deposited after the first dielectric layer and before the second dielectric layer to form a sample composite stack with the following order of layers: substrate / first dielectric layer / infrared absorption layer / se...
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Abstract
Optically transparent and infrared absorbing films include an infrared absorbing layer including, for example, a transparent conductive oxide. The film can include an infrared absorption composite stack that can include, for example, an infrared absorption material disposed between dielectric layers. The film can synergistically improve optical and solar properties.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority to French Application No. 1402044, filed Sep. 15, 2014, entitled “OPTICAL FILM INCLUDING AN INFRARED ABSORPTION LAYER,” by Singh et al. Each patent application cited herein is hereby incorporated by reference in its entirety.FIELD OF THE DISCLOSURE[0002]The present disclosure relates to composite films, and more particularly to optically transparent composite films including an infrared absorption layer.RELATED ART[0003]Composites that absorb radiation in the infrared spectrum while transmitting radiation in the visible spectrum have important applications, for example as coverings applied to windows in building or vehicles.[0004]For certain such composite films, visible light transmittance must be high. In the United States of America for example, automotive windshields must have a visible light transmittance of at least 70%. However, for conventional composite films, including an infrared absorption la...
Claims
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IPC IPC(8): G02B5/20C23C16/50G02B5/22
CPCG02B5/208C23C16/50G02B5/22G02B1/16
Inventor SINGH, LAURA JANEBON SAINT COME, YEMIMA ANNEJOSEPH, CAMILLE
Owner SAINT GOBAIN PERFORMANCE PLASTICS CORP